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4 August, 18:44

Positive root seven times negative root seven

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  1. 4 August, 19:22
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    7i

    =√7 * √-7

    =√ (7*-7)

    =√-49

    = i √49

    =7i : you cannot square root a negative number so you take out an imaginary number which is i, making it possible to square root.
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